Military 24 volt DC motor and I don't know what this was used for. It weighs about 20 lbs and I tested it out many years ago when I had a 24 volt power source. It has been in a dry storage and I'm sure it still works well. I don't know the RPM or what this was used for in the military. Because the bolts on the motor have safety wire so they won't come undone, I am assuming this was used on an aircraft.
You would be welcome to test this if your interested and if you have a 24 volt power source.